On 08/02/2012 10:41 PM, Josh Triplett wrote:
> On Thu, Aug 02, 2012 at 07:54:42PM +0200, Sasha Levin wrote:
>> /* I've "preprocessed" the DEFINE macro below */
>> union {
>> struct hash_table table;
>> struct {
>> size_t bits;
>> struct hlist_head buckets[32];
>> }
>> } my_hashtable;
>
> That expansion doesn't match the macros. Using the most recent
> definitions of DEFINE_HASHTABLE and DEFINE_STATIC_HASHTABLE from above,
> the definition would look something like this:
>
> static union {
> struct hash_table my_hashtable;
> struct {
> size_t bits;
> struct hlist_head buckets[1 << 5];
> } __my_hashtable;
> } = { .my_hashtable.bits = 5 };
It's different because I don't think you can do what you did above with global variables.
You won't be defining any instances of that anonymous struct, so my_hashtable won't exist anywhere.
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